Báo cáo lâm nghiệp: "Water relations of adult Norway spruce (Picea abies (L) Karst) under soil drought in the Vosges mountains: whole-tree hydraulic conductance, xylem embolism and water loss regulation " ppsx

... 146-153 Original article Water relations of adult Norway spruce (Picea abies (L) Karst) under soil drought in the Vosges mountains: whole-tree hydraulic conductance, xylem embolism and ... noted at the beginning of the the sap flux through the plant, the soil water status and the total hydraulic conductance from...

Ngày tải lên: 08/08/2014, 18:21

... area of the stand, as stated in equation [5]. Original article Water relations of adult Norway spruce (Picea abies (L) Karst) under soil drought in the Vosges mountains: water ... the occurrence of xylem cavitation under intensive drought. This paper reports results from the investigation into the first two points; th...

Ngày tải lên: 08/08/2014, 19:21

... parts of the stands) than in the Krušné hory Mts. (with underplanting realized inside the stands) was also a reason for the relative failure of underplanting in the existing spruce stands in the ... 11 Age (cm) Underplanting of present stands spruce Reconstruction of stands Underplanting birch Inspection Bohemian - Moravian upland Lineární (Underplanting of p...

Ngày tải lên: 07/08/2014, 03:22

... (RWC a ) and inverse of osmotic potential at full turgor (Ψπ 100 ). The x- and y-coordinates of the first data point of the linear portion of the PV curve corresponded to relative water content at the ... Ψ pd and Ψ min in all measurement dates (P < 0.001), except at the beginning of the two soil- drying cycles (July 23 and Oct 3), when soil water...

Ngày tải lên: 08/08/2014, 00:22

... selected for the experiment both in the CO 2 spring and in the control site. In July (just before the second day of mea- surements), the amount of xylem embolism was evaluated ... undertaken with the aim of examining water relations of mature trees of holm oak and downy oak grown in ele- vated atmospheric carbon dioxide...

Ngày tải lên: 08/08/2014, 18:21

... after the drought, the dominated roofed trees on D3 developed better in the following years than the trees of the other two roofs. The radial growth of the dominated trees was not affected by the ... variants. The mean height increment decreased continuously since the beginning of the measurements in 1988 from an average of 37 cm on all sites to a minimum i...

Ngày tải lên: 08/08/2014, 14:20

... view of relating the structure and physical properties of the water conducting system to plant water balance and adaptation to the environment. In this framework, the partitioning of the hydraulic ... the basis of equation 6 includes the resistance of the soil- to-root pathway, it is possible that the measured R root was due to the increase of R...

Ngày tải lên: 08/08/2014, 01:21

... A., 1993. Effects of drought on the yellowing status and the dynamics of mineral elements in the xylem sap of declining spruce (Picea abies L.). Plant and Soil, 150: 303–306. DRIESSEN P., ... specific and topically individual interactions with soil and these interactions in uence its state, (2) the in uence of forest management reflects in humific...

Ngày tải lên: 07/08/2014, 03:22

... necessary to minimize the incidence of solar radiation on the soil in the existing Norway spruce groups of stands. CONCLUSION e Norway spruce decline and dieback in lower forest altitudinal vegetation ... that the causes of the decline are as follows: planting of Norway spruce outside the optimum of its ecovalence, increased global radia- tion, we...

Ngày tải lên: 07/08/2014, 03:22

... light- ning and wind-felling, and in the merocoenosis of snags and fragments (tree parts), in spruce stands of diff erent age and in diff erent situations with re- gard to the occurrence and population ... species and wood-destroying insect associates of spruce, not even in cases where the needle loss was documented. According to N (1962), the phlo...

Ngày tải lên: 07/08/2014, 10:21